Western Mountaineering Lynx MF Sleeping Bag: -10 Degree Down description:It's the age old question: Do you take a warm, comfy sleeping bag that's heavy and doesn't compress very well or a lightweight bag that isn't quite warm enough' Weighing only 3lb 2oz and featuring eight inches of loft, the Lynx MF Sleeping Bag solves the problem. Western Mountaineering stuffed this winter sleeping bag with ultralight, ultra compressible 850-fill down, which keeps you warm down to -10F. A full-length draft tube and overstuffed draft collar help seal in heat for even more warmth. The microfiber shell not only contributes to the Lynx MF's light weight, it resists wind and moisture and breathes well, preserving the down's loft.